Henry a



(No Model.)

H. A. AINSWORTH.

- DROP HAMMER. No. 363,851. Patented May 24,1881? PER 0/? EQUIVALENT MAT E/AL.

UNTTED STATES PATENT EErcE.

VHITE & 00., OF SAME PLACE.

DROP HAMMER.

SPECIFICATION forming part of Letters Patent No. 363,351, dated May 24,1887.

Application filed March 1, 1887. Serial No. 229,297.

To all whom it may concern.-

Be it known that I, HENRY A. AINSWORTH, of Moline, in the county of RockIsland and State of Illinois, have invented certain new and usefulImprovements in Drop-Hammers, of which the following is aspeeification.

My invention relates to drop-hammers; and it consists in thecombination, with the hammer and a lifting-strap therefor, ofelevatingrollers having a bearing-face composed wholly or in part ofpaper or equivalent material.

Theinvention further consists in the combination, with theelevatingrollers thus constructed, of a hammer provided with a metallic,preferably steel, strap arranged to pass between the rollers.

I-Ieretofore it has been customary to employ in machines of this classcast iron rollers, which were arranged to press upon both sides of awooden strap passing upward between them;.but such plan is objectionablefor the reason that in a comparatively short time the wood splinters andslivers off, and renders the strap useless, because of its decreasedstrength and thickness, the rollers, as a rule, being capable ofapproaching each other alimited distance only. Furthermore, in applyingpressure upon the strap by means of or through the, metallic rollers thelatter, or some portion of the framework directly or indirectly c011-nected therewith, are liable to be strained and broken, this beingespecially true where the hammer-head isheavy and'eonsiderable pressureis required to be applied to its strap to elevate it.

To overcome these objections to prior eonstructions is the object of myinvention.

Referring to the accompanying drawings, Figure l is a perspective viewof myimproved drop-l1ammer, and Figs. 2 and 3 views illus trating theconstruction of the rollers.

Referring to the drawings, A indicates the press as a whole,whieh' maybe of any desired "construction, except as to the features here- (Nomodel.)

ness, and durability. This strap passes upward between theelevating-rollers D D, as is usual, one of the rollers, D, being carriedin fixed bearings, whilethe other, D", is mounted in a pivoted yoke, E,as shown.

Upon the shaft F of each roller is a gearwheel, G, the gears on eachroller meshing and giving uniform rotation thereto, one of the shaftsbeing furnished with a band-pulley, as usual, to receive motion from anyconvenient source.

The rollers D D'may be made up invarious ways-that is to say, they mayhe composed of a series of disks clamped between metallic end plates, asshown in Fig. 2; or they may be made by winding thepaper about therollershaft until a roll of the required size is built up, as shown inFig. 3. Instead of either of these plans the roller may be made ofpapiermaeh compressed in a hydraulic press to the desired size and form.I do not, however, restrict myself to any particular method or manner ofbuilding up the bearing-surfaces of these rollers, as it is a matterthat may be varied considerably without departing from the spirit of myinvention.

\Vhile paper or papier mach will give just the degree of elasticitydesired, and will present a surface admirably adapted to act upon themetal strap, I do not limit myself to its use, but mean to include in myclaims any equivalent material, such as leather, real or artificial, andlike fibrous substances.

The rollers herein described may be used in connection with the ordinarywood hammerstraps heretofore used, if desired; and it will. be seen thatunder this combination the wood will not splinter or sliver off, as thebearingfaees of the rollers are somewhat elastic or yielding, and whilethey press against the strap with sufficient force to elevate thehammer, the strap will not be mashed or crushed out of shape, as happenswhen metallic rollers are used. I prefer, however, to use the steelstrap for the reason that it is stronger, lighter, and more durable, andis not as liable to injure the face of the rollers as the wooden strap.

Having thus described my invention, what I claim is- 1. In a drop-press,the combination, with a hammer andits strap, of the elevating-rollersand arranged to slide therein, a steel lifting- D D, provided withbearing-faces of paper or strap attached to the hammer-head and exitsequivalent. 7 tending upward therefrom, and paper-faced I 5 2. In adrop-press, the combination, with a rolls bearing against opposite facesof said 5 hammer and the metallic strap secured therestrap,substantiallyas set forth.

to, of the rollers D D, provided with bearing- In witness whereof Ihereunto set my hand faces of paper or its equivalent. in the presenceof two witnesses. 3. In a drop-press, the combination, with a V Y hammerand its strap, of the elevating-rollers H BY AINSNVORTH' 10 providedwith yielding or elastic bearing-faces.

T4. The combination, in a drop-press, of a supporting-frame, ahammer-head mounted Witnesses:

J. B. OAKLEAF, JNo.. J. WILLIAMS.

